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Commitments and contingencies - Operating Lease Obligations (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Jan. 31, 2012
vehicle
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| Operating Leased Assets [Line Items] | |||
| Future minimum payments receivable | $ 51,033us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable | ||
| Office space and warehouse facilities | |||
| Operating Leased Assets [Line Items] | |||
| Rent expense, gross |
615,602us-gaap_OperatingLeasesRentExpenseMinimumRentals / us-gaap_PropertyPlantAndEquipmentByTypeAxis = tcgn_OfficeSpaceAndWarehouseFacilitiesMember |
616,041us-gaap_OperatingLeasesRentExpenseMinimumRentals / us-gaap_PropertyPlantAndEquipmentByTypeAxis = tcgn_OfficeSpaceAndWarehouseFacilitiesMember |
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| Rent expense, sublease rent offset |
201,440us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 / us-gaap_PropertyPlantAndEquipmentByTypeAxis = tcgn_OfficeSpaceAndWarehouseFacilitiesMember |
127,784us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 / us-gaap_PropertyPlantAndEquipmentByTypeAxis = tcgn_OfficeSpaceAndWarehouseFacilitiesMember |
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| Rent expense, net |
414,162us-gaap_OperatingLeasesRentExpenseNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = tcgn_OfficeSpaceAndWarehouseFacilitiesMember |
488,257us-gaap_OperatingLeasesRentExpenseNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = tcgn_OfficeSpaceAndWarehouseFacilitiesMember |
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| Vehicles | |||
| Operating Leased Assets [Line Items] | |||
| Rent expense, net |
$ 1,839us-gaap_OperatingLeasesRentExpenseNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_VehiclesMember |
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| Operating Leased Assets, Number of Assets |
1tcgn_OperatingLeasedAssetsNumberOfAssets / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_VehiclesMember |
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- Definition
Operating Leased Assets, Number of Assets No definition available.
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- Details
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- Definition
Future minimum rental payments in aggregate as of the balance sheet date under operating leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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